A Good Alibi

(Originally in English)

An opera singer who was married asked her husband,
"Why do you always go out onto the balcony whenever
I sing? Don't you like my singing?"
So the husband said, "No, no. I just go out so that all
the neighbors can see that I'm not beating you."

不在场证明
　　一位歌剧演唱家问她丈夫：「为什么每次我唱歌的时候，
你总是跑到阳台去呢？你不喜欢我的歌声吗？」丈夫回答：
「不！不！我出去只是为了让邻居知道我并没有在打你。」